A co-employee of mine, who is of that “persuasion” used that term (breeders) around me once.
Once.
I grew up in Palm Springs, I got used to being called a ‘breeder’. One of my bosses (gay) at an antiquarian bookstore I worked at even bough me a t-shirt so I didn’t get hit on by the roving bands of lesbians as much.
One time this total golf bull-dyke hit on me, I tried to me polite, then finally told her I was married - thinking she would figure it out. She asked me what my wife’s name was - so I told her (Mr R’s name is very obviously male). She got this disgusted look and said “Oh you are one of THEM!” Hence the t-shirt.